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| 型号： | E5561 |
| 英文描述： | e5561 Advance Information [Updated 4/03. 26 Pages] Read/Write transponder IC for contactless RF identification for highly sophisticated security applications. |
| 中文描述： | e5561推进信息[更新4 / 03。 26页]读/写非接触式射频转发器的高度复杂的安全应用识别芯片。 |
| 文件页数： | 25/26页 |
| 文件大小： | 410K |
| 代理商： | E5561 |
8
e5561
4699A–RFID–04/03
Protection
Mechanisms
Several protection mechanisms are implemented into the e5561. These are mainly:
Error mechanisms to detect a fault. These mechanisms are always enabled.
Programmable protection mechanisms. These mechanisms are optional. When
used, they provide protection against attempts to break the security system.
Password Protection
If the password protection is enabled, the e5561 remains in ID mode even if it has
received a correct write sequence. The only possible operation is to modify the content
of block 9 by sending the correct password bits. In all other cases, an error handling pro-
cedure is started and the e5561 enters ID mode.
Lock-bit Protection
A lock-bit is a physical part of the EEPROM's content and is under user control. The
lock-bit protection mechanism has two different effects:
Avoid programming (modifying data) of the EEPROM's blocks
Avoid reading out the crypto key from the EEPROM using the direct-access mode
If the base station tries to read out the crypto key and the corresponding lock-bit is set,
the e5561 will enter ID mode immediately. Once the crypto key lock-bit is set, the crypto
key can not be modified or read out any more.
There are several lock-bits available, each affecting a special data region of the
EEPROM. The main groups of lock-bits are:
Lock-bits to inhibit programming of the specified blocks of the EEPROM
Lock-bits to inhibit programming of the specified blocks of a specific address range
In both cases, an attempt to modify a data region protected by a lock-bit will cause an
error handling procedure (i.e., the e5561 enters ID mode)
Stop Mode
The stop mode can also be used as a protection mechanism, e.g., during configuration
at manufacturing. The base station can configure the transponders one by one, forcing
them into stop mode after programming. In this way, transponders can be programmed
even if there are other transponders in the RF field at the same time.
Operating the e5561
General
The basic functions of the e5561 are:
Supply the IC from the coil
Read data from the EEPROM to the base station
Authenticate the IC
Receive commands from the base station and program the received data into the
EEPROM.
Several write errors can be detected to protect the memory from being overwritten with
uncorrect data. A password function is implemented ensuring that only authorized peo-
ple can operate the IC.
Operating modes:
ID mode: the e5561 sends the ID code to the base station
Programming mode: the e5561 programs the EEPROM with data bits received from
the base station
Direct-access mode: the e5561 sends the content of single blocks of the EEPROM
to the base station
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相关代理商/技术参数 |
参数描述 |
|---|---|
| E5561_06 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Standard Read/Write Crypto Identification IC |
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| E5562-60L121-L | 功能描述:以太网和电信连接器 RJ11 6P2C SIDE ENTRY RoHS:否 制造商:Pulse 产品:Modular Jacks 性能类别: USOC 代码:RJ45 位置/触点数量: 安装风格:Through Hole 端口数量:1 x 1 型式:Female 屏蔽: 电流额定值: 电压额定值: 触点电镀: 外壳材料:Thermoplastic IP 等级: |
| E5562-60LU22-L | 功能描述:以太网和电信连接器 RJ11 6P2C SIDE ENTRY RoHS:否 制造商:Pulse 产品:Modular Jacks 性能类别: USOC 代码:RJ45 位置/触点数量: 安装风格:Through Hole 端口数量:1 x 1 型式:Female 屏蔽: 电流额定值: 电压额定值: 触点电镀: 外壳材料:Thermoplastic IP 等级: |
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